Compañía de Minas Buenaventura S.A.A. announced preliminary production results for the fourth quarter and year end of 2018. For the quarter, the company reported gold from orcopampa of 13,372 Oz, from Tambomayo of 31,026 Oz, from La Zanja of 20,101 Oz, from Tantahuatay of 49,708 Oz, from Yanacocha of 141,465 Oz and from El Brocal of 4,111 oz; Silver production from Uchuccha cua of 3,256,870 Oz, from Julcani of 666,259 Oz, from Mallay of 97,670 Oz, from Tambomayo of 873,249 Oz and from El Brocal of 934,642 Oz; Lead from Julcani of 264 MT; from Uchucchacua of 4,961 MT; from Mallay of 401 MT, from Tambomayo of 1,522 and from El Brocal of 5,361 MT; Zinc production from El Brocal of 9,702 MT, Uchucchacua of 5,867 MT, Mallay of 1,107 MT and from Tambomayo of 2,080 Mt; Copper production from El Brocal of 12,093 MT.

For nine months, the company reported gold from orcopampa of 115,887 Oz, from Tambomayo of 129,172, Oz, from La Zanja of 71,630 Oz, from Tantahuatay of 173,192 Oz and from Yanacocha of 514,563 Oz and from EI BrocaI of 21,429; Silver production from Uchucchacua of 15,420,102 Oz, from Julcani of 2,482,907 Oz, from Mallay of 514,081 Oz, from Tambomayo of 3,929,808 Oz and from El Brocal of 3,901,869 Oz; Lead from Julcani of 1,048 MT; from Uchucchacua of 19,122 MT; from Mallay of 1,768 MT, from Tambomayo of 4,220 and from El Brocal of 20,582 MT; Zinc production from El Brocal of 45,593 MT, Uchucchacua of 21,840 MT, Mallay of 4,151 MT and from Tambomayo of 8,685 Mt; and Copper production from El Brocal of 46,231 MT.

The company provided production guidance for the full year of 2019. For the full year of 2018, the company expects to produce gold from orcopampa of 75k to 90k Oz, from Tambomayo of 90k to 110k Oz, from La Zanja of 25k to 35k Oz, from Tantahuatay of 150k to 170k Oz and from EI Brocal of 25k to 30k Oz, Yanacocha to be 510k Oz; Silver production is expected from Uchucchacua of 14.5M to 15.5M Oz, from Tambomayo of 2.5M to 3.0M Oz, from Julcani of 2.2M to 2.5M Oz, from Mallay of 0 Oz and from El Brocal of 4.5M to 5.5M Oz. Lead is expected from Julcani of 0.9K to 1.0K MT, from Uchucchacua of 22.0K to 26.0K MT; from Mallay of 0 MT; from Tambomayo of 4.0K to 5.0K MT and from EI Brocal of 22.0K to 26.0K MT. Zinc production is expected from El Brocal of 57k to 65k MT, Uchucchacua of 27k to 32k MT, Mallay of 0 MT and Tambomayo of 6k to 8k MT. Copper production is expected from El Brocal of 47k to 52k MT.